DaemonSet

Add a DaemonSet for your AWS or GCP Services in DuploCloud

Kubernetes DaemonSets are controllers that manage Pod lifecycles, ensuring that one copy of a Pod runs on each node (or a selected subset of nodes) in the cluster. It is defined using a YAML or JSON configuration file, similar to other Kubernetes resources like Deployments or StatefulSets. See the Kubernetes DaemonSet documentation for more information.

Creating a DaemonSet in DuploCloud (AWS or GCP)

1. From the DuploCloud Portal, navigate to Kubernetes -> DaemonSet, and click Add. The Add DaemonSet page displays.

2. In the Name field, specify a unique name for the DaemonSet.

3. Set the Local Tenant toggle switch. When set to true, the Daemon set deploys only on hosts in this Tenant instead of the entire cluster.

4. In the Configurations field, enter the DaemonSet configurations. See the example DaemonSet JSON below.

5. Click Create. The DaemonSet is created and the configurations applied.

{
   "apiVersion": "apps/v1",
   "kind": "DaemonSet",
   "metadata": {
     "name": "CUSTOMER_NAME-elasticsearch",
     "namespace": "duploservices-test31",
     "labels": {
       "k8s-app": "CUSTOMER_NAME-logging"
     }
   },
   "spec": {
     "selector": {
       "matchLabels": {
         "name": "CUSTOMER_NAME-elasticsearch"
       }
     },
     "template": {
       "metadata": {
         "labels": {
           "name": "CUSTOMER_NAME-elasticsearch"
         }
       },
       "spec": {
         "tolerations": [
           {
             "key": "node-role.kubernetes.io/control-plane",
             "operator": "Exists",
             "effect": "NoSchedule"
           },
           {
             "key": "node-role.kubernetes.io/master",
             "operator": "Exists",
             "effect": "NoSchedule"
           }
         ],
         "containers": [
           {
             "name": "CUSTOMER_NAME-elasticsearch",
             "image": "quay.io/elasticsearch/:v2.5.2",
             "resources": {
               "limits": {
                 "memory": "200Mi"
               },
               "requests": {
                 "cpu": "100m",
                 "memory": "200Mi"
               }
             }
           }
         ],
         "terminationGracePeriodSeconds": 30
       }
     }
   }
 }

Hint: To have a DaemonSet appear on the Apps dashboard and be grouped with related resources, add an app name label under both metadata.labels and template.metadata.labels using this format: app.duplocloud.net/app-name: "<app name>". Use the same <app name> for any related Services, Deployments, or StatefulSets.